Jython works just fine on App Engine. There is even a list of popular API's that do.
I don't know about speed differentials there. http://groups.google.com/group/google-appengine-java/web/will-it-play-in-app-engine?pli=1 --Michael On Tue, Dec 15, 2009 at 2:01 PM, Jesaja Everling <jeverl...@gmail.com> wrote: > Maybe the people asking if it's possible to run Jython on App Engine > were on to something, after all! ;) > I also think choosing the toolkit that works best for the task at hand > is more important. Furthermore I'm confident the App Engine team will > speed up the Python runtime further; maybe that's part of what Unladen > Swallow is meant for. > A very interesting observation, though! > > Best Regards, > > Jesaja Everling > > > On Tue, Dec 15, 2009 at 7:34 PM, Michael Langford > <michael.langf...@gmail.com> wrote: >>>If your app exceeds free quota, this deference can impact total amount of >>>costs significantly. >> >> As can the difference in price/productivity between the two languages >> as far as total cost of development goes. >> >> The incremental costs on appengine between the two technologies are >> dwarfed by the productivity differences between them for most >> project's I'd imagine. I'd say if you're charging clients the same >> amount to develop an app in Java as you are in Python, you're vastly >> overcharging for the python or undercharging for the java (baring >> language specific libraries available for one platform and not on the >> other). >> >> For a huge number of programs, the difference in development time >> between a higher level language and a lower level language is never >> recouped by increased runtime in the faster, lower level language. >> >> For many apps, even java developers are faster writing python than >> java (Although they all seem to go for Ruby instead). >> >> >> --Michael >> >> >> On Tue, Dec 15, 2009 at 1:02 PM, Takashi Matsuo >> <matsuo.taka...@gmail.com> wrote: >>> Hello, >>> >>> Today I noticed that App Engine Java environment became much faster >>> then before. The spin up cost is about 700cpu_ms with the simplest >>> servlet. Additionally, when it comes to serving with a hot instance, >>> the cost reduces to 0-2cpu_ms, while python environment takes about >>> 5-7cpu_ms even with the simplest handler. >>> >>> To make it simple here, lets say Java takes 1cpu_ms while Python takes >>> 6cpu_ms for serving very simple page. >>> How many requests can they serve with 1 cpu hour? >>> >>> Java: 3600000 requests/1 cpu hour >>> Python: 600000 requests/1 cpu hour >>> >>> This is a big deference; 6 times! If your app exceeds free quota, this >>> deference can impact total amount of costs significantly. I'm a big >>> Python fan and I have believed that appengine Python runtime is >>> superior to Java runtime, so I've been trying to persuade others to >>> use Python rather than Java for now. >>> >>> Having said that, today it turns out for me that Java runtime is much >>> more cost effective than Python runtime in some cases, so should I >>> recommend others to use Apppengine Java if they are very sensitive to >>> cpu costs? >>> >>> I'd appreciate if anyone could share one's thoughts/experiences on this. >>> >>> TIA >>> >>> -- >>> Takashi Matsuo >>> Kay's daddy >>> >>> -- >>> >>> You received this message because you are subscribed to the Google Groups >>> "Google App Engine" group. >>> To post to this group, send email to google-appeng...@googlegroups.com. >>> To unsubscribe from this group, send email to >>> google-appengine+unsubscr...@googlegroups.com. >>> For more options, visit this group at >>> http://groups.google.com/group/google-appengine?hl=en. >>> >>> >>> >> >> >> >> -- >> Michael Langford >> Phone: 404-386-0495 >> Consulting: http://www.RowdyLabs.com >> >> -- >> >> You received this message because you are subscribed to the Google Groups >> "Google App Engine" group. >> To post to this group, send email to google-appeng...@googlegroups.com. >> To unsubscribe from this group, send email to >> google-appengine+unsubscr...@googlegroups.com. >> For more options, visit this group at >> http://groups.google.com/group/google-appengine?hl=en. >> >> >> > > -- > > You received this message because you are subscribed to the Google Groups > "Google App Engine" group. > To post to this group, send email to google-appeng...@googlegroups.com. > To unsubscribe from this group, send email to > google-appengine+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/google-appengine?hl=en. > > > -- Michael Langford Phone: 404-386-0495 Consulting: http://www.RowdyLabs.com -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
